CA1222333A - Current supply circuit - Google Patents

Current supply circuit

Info

Publication number
CA1222333A
CA1222333A CA000472639A CA472639A CA1222333A CA 1222333 A CA1222333 A CA 1222333A CA 000472639 A CA000472639 A CA 000472639A CA 472639 A CA472639 A CA 472639A CA 1222333 A CA1222333 A CA 1222333A
Authority
CA
Canada
Prior art keywords
constant
current
voltage
circuit
lines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000472639A
Other languages
English (en)
French (fr)
Inventor
Yuzuru Tsunoda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Application granted granted Critical
Publication of CA1222333A publication Critical patent/CA1222333A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
CA000472639A 1984-01-26 1985-01-23 Current supply circuit Expired CA1222333A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11023/84 1984-01-26
JP59011023A JPS60157369A (ja) 1984-01-26 1984-01-26 通話電流供給回路

Publications (1)

Publication Number Publication Date
CA1222333A true CA1222333A (en) 1987-05-26

Family

ID=11766504

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000472639A Expired CA1222333A (en) 1984-01-26 1985-01-23 Current supply circuit

Country Status (3)

Country Link
US (1) US4737988A (cs)
JP (1) JPS60157369A (cs)
CA (1) CA1222333A (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052039A (en) * 1990-01-16 1991-09-24 Northern Telecom Limited Line interface circuit

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT291356B (de) * 1969-05-09 1971-07-12 Itt Austria Schaltungsanordnung zur selbsttätigen Aufrechterhaltung der Symmetrie von Speiseschaltungen für Teilnehmerstellen in Fernmelde-Anlagen unter Verwendung von Transistoren
GB1251150A (cs) * 1970-07-08 1971-10-27
US3916110A (en) * 1974-05-02 1975-10-28 Gte Automatic Electric Lab Inc Line circuit employing constant current devices for battery feed
JPS522109A (en) * 1975-06-24 1977-01-08 Hitachi Ltd Dc current supplying circuit
DE2624021A1 (de) * 1976-05-28 1977-12-08 Siemens Ag Schaltungsanordnung fuer mit jeweils einen haltestrom benoetigenden koppelkontakten aufgebaute koppelnetze, insbesondere fuer fernsprechleitungskoppelnetze in fernsprechvermittlungsanlagen
JPS5341917A (en) * 1976-09-29 1978-04-15 Hitachi Ltd Dc current supply circuit
ZA784547B (en) * 1977-08-17 1979-08-29 Post Office Unbalanced/balanced converter circuits
IT7823635A0 (it) * 1978-05-22 1978-05-22 Sits Soc It Telecom Siemens Di commutazione. ponte di alimentazione a corrente costante per centrali telefoniche
JPS601993B2 (ja) * 1979-03-01 1985-01-18 沖電気工業株式会社 電流供給回路
JPS57135592A (en) * 1981-02-16 1982-08-21 Nec Corp Subscriber circuit
DE3138649A1 (de) * 1981-09-29 1983-04-14 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren und schaltungsanordnung zur speisung einer teilnehmerendeinrichtung

Also Published As

Publication number Publication date
JPS60157369A (ja) 1985-08-17
US4737988A (en) 1988-04-12
JPH0351349B2 (cs) 1991-08-06

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Legal Events

Date Code Title Description
MKEX Expiry